Audio converter
What Audio converter actually does
Converting a compressed file to another compressed format by decoding straight into the new encoder stacks two generations of loss on top of each other, because the decoder hands the encoder already-degraded numbers that get degraded again. This tool takes the detour that costs nothing: when both sides are lossy, the file is first decoded to a 24-bit lossless intermediate and only then encoded, so the second codec works from the cleanest numbers available. Lossless targets skip the detour entirely. Beyond the conversion itself the page answers the question most converters leave open - is the output really what its name says - by reading the leading bytes of the result and checking the format signature against the extension chosen, and the receipt reports the decode path taken, the resulting sample rate and channel count. Optional bitrate and sample-rate overrides exist for targets that need them, and a value the encoder would reject is refused by name before any run.
How to use it
- Drop one file or a batch in any mixture of the supported formats.
- Pick the target format. Bitrate, sample rate and channel count stay optional; empty fields keep the source's values.
- Run. Lossy-to-lossy jobs show the lossless-intermediate decode path on the receipt.
- Read the checks: the produced bytes are sniffed against the chosen format's signature, and the decoded duration is compared against the source.
- Download individually or take the whole batch as a zip.
Useful for
- Turn a voice memo or a download into the format a device or editor actually accepts.
- Extract editable WAV files from compressed sources for further editing.
- Downsample a pile of 48 kHz masters to delivery rates in one batch.
- Check whether an old file labeled as one format secretly contains another.
Limits worth knowing
- Converting cannot restore quality already lost: a 128 kbps source re-encoded at 320 kbps is bigger, not better.
- DRM-protected or unusual codecs fail on their own row with the reason named.
- Metadata coverage varies by container; tags can be simplified on cross-format moves.
Questions people ask
Which format should I pick?
WAV or FLAC when quality or further editing matters and size does not; MP3 or M4A for the widest playback support; OGG when size matters and players are known to handle it.
What does the intermediate step do?
When both source and target are lossy, the file is decoded once to lossless 24-bit audio and encoded from there, so the second lossy stage never processes the first stage's rounding artifacts directly.
Are my files uploaded?
No. Conversion happens entirely in this tab.